Marking pens



March 5', 1957 H. w. .locKERs 2,783,488

MARKING PENS Filed Feb. 27, 1956 BYWEM ATTORNEY United States Patent O MARKING PENS Harry W. Jockers, Philadelphia, Pa.

Application February 27, 1956, Serial No. 567,851

2 Claims. (Cl. 15--139) The object of this invention is to devise a novel con struction of a marking pen which can be employed for the marking and identification of any desired material or article, and wherein the feed of the marking fluid is controlled in a novel manner.

A further object of' the invention is to provide an enlarged chamber in advance of lthe valve and an absorbent washer or block of material at the rear of the valve and chamber so that sufficient fluid will be maintained in the chamber for eicient operation of the marking pen.

With the foregoing and other objects in view as will hereinafter clearly appear, my invention comprehends a novel construction and arrangement of a marking pen.

For the purpose of illustrating the invention, II have shown in the accompanying drawings preferred embodiments of it which I have found in practice to give sa-tisfactory and reliable results. :It is, however, to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited, except by the scope of the appended claims, to the exact arrangement and organization of these instrumentalities as herein shown.

Figure l is a front elevation of a marking pen embodying my invention. n

Figure 2 is a front elevation, partly broken away, and with the cap removed.

-Figure 3 is a sectional elevation, on an enlarged scale, of a portion of the marking pen with the valve in its closed position.

Figure 4 is a view similar to that of 'Figure 2 but showing the marking pen inverted and the valve in its open position.

Figure 5 is a side elevation, partly broken away, of a modified form having a portion of the body portion and tip shown with the tip in threaded engagement with the body portion.

Figure 6 is a section on line 6 6 of Figure 4.

Similar numerals of reference indica-te corresponding parts.

'Referring to the drawings:

The marking pen has a chambered body portion 1, the rear end of which is closed and the front end open and adapted to receive a tip 2 through which the liquid in the chamber of the body portion is dispensed. The tip is in sliding engagement with the body portion.

The tip 2 has an internal chamber 3 undercut at its rear end to form a shoulder 4 and having at its front end an annular groove 5 which contributes to form a valve seat 6. The chamber 3 communicates with a conical passage 7 leading to a forwardly extending discharge passage 8 of uniform diameter in which a felt marker 9 is adjustable due to its frictional engagement with the walls of the passage 8. The rear end of the felt marker 2,783,488 Patented Mar. 5, 1957 9 contacts at all times a flexible valve disc 10 which is backed up by a non-exible disc 11 subjected to the pressure of a spring 12, the forward end of which contacts the non-'flexible disc 11 and the rear end of which seats against the shoulder 4 of the tip 2.

The tip is preferably threaded to receive a cap 13 which seats against a sealing gasket 14 pressed on to the tip.

Vn marking pens as heretofore manufactured in so far as I am aware, the chamber in the body portion has been open to the chamber in the tip. In such construction when the valve opens, there is a tendency -to suck the liquid in the chamber of the tip intov the chamber of the body portion and then a flow of liquid from the chamber in the body portion to the chaii'iber in the tip and an uniform supply of liquid is net niaintained at all times in the chamber of the tip. -In order to overcome this, I have provided an absorbent 15 such as felt v'in frictional engagement with the walls of the chamber in the body portion directly in rear jo'f the rear end of the tip and through which the liquid seeps. The chamber in the tip is substantially filled at`- all times and surging of the liquid during the opening" and closing of the valve is overcome.

IIn the embodiment seen in Figure 5, the tip is in threaded engagement as at 16 with the body iportion.

When the felt marker is pressed against auf article, its rear end portion is compressed and widens out and due to the conical intake end of the dischargegpassage, a space is` provided to receive fiber portions ofthe marker without such portions passing between the valve and its seat to cause leakage at the valve and an verfeed of liquid through the marking felt.

The use of an absorbent disc between the chamber in the body portion and the chamber in the ,tip has another important advantage. `If the felt marker 9 is pressed `down against the article to be marked and held down the marker 9 will not be ooded sinil only the liquid in the chamber of the tip will be passed to the marker until additional liquid is fed through the absorbent disc to the chamber in the tip.

Having thus described my invention, what; I claim as new and desire to secure by Letters Patent is:

1. AY marking pen, comprising a body portion having a chamber open at its forward end, a tip having a rear end connected with the forward end of Athe body portion and having an internal chamber with an undercut shoulder at its rear end and with an annular groove at its forward end contributing to form a valve seat, said tip having a discharge passage leading from said seat and having a `conical intake end, a flexible valve disc engaging said valve seat, a non-flexible valve disc backing up said flexible disc, a spring having its rear end seated against said undercut shoulder and having its forward end contacting said nondlexible disc, a felt marker in said discharge passage having its rear end contacting said flexible disc, and an absorbent disc in the body portion directly in rear of the rear end of the tip and through which the liquid seeps from the chamber in the body portion into the chamber in the tip.

2. The construction defined in claim 1, wherein the absorbent disc is composed of felt.

Petion Feb. 27, 1951 Hempel et al June 30, 1953 

